In today's lecture, we'll discuss the history of the bicycle. The earliest bicycles, called 'hobby horses,' appeared in the early 19th century and were pushed along by the rider's feet. Then came the 'penny-farthing' in the 1870s, known for its large front wheel. However, it was dangerous because riders sat high above the ground. The modern safety bicycle, with two equal-sized wheels and a chain drive, was developed in the 1880s. This design made cycling much safer and more accessible to the general public.
❓ Vấn đề chính của xe đạp bánh to bánh nhỏ (penny-farthing) là gì?
A. A. Nó quá chậm.
B. B. Rất khó để điều khiển.
C. C. Điều này rất nguy hiểm vì vị trí ngồi của người lái quá cao.
D. D. Nó không thể được sử dụng trên đường.
✅ 正确答案
C. It was dangerous due to the rider's high position.